Astronomy Colloquium for 2019-11-27

Colloquia are usually preceded by espresso and ice cream at 1:45 pm
outside room PSC 1150 and are followed by an informal reception at
5:15 pm in that room. Anyone interested in talking with the speaker,
or being added to the colloquium announcement email list, should contact
the colloquium organizer. Lunch will normally be reserved for the speaker
to talk to graduate students. Anyone asking a question during a talk is asked to raise their hand and be acknowledged before speaking.